Phase measurement by quadriwave lateral shearing interferometry using spatial light modulator

T. Fordey; Z. Bouchal

doi:10.1117/12.2556689

6 February 2020 Phase measurement by quadriwave lateral shearing interferometry using spatial light modulator

T. Fordey, Z. Bouchal

Proceedings Volume 11369, Fourteenth International Conference on Correlation Optics; 1136912 (2020) https://doi.org/10.1117/12.2556689
Event: Fourteenth International Conference on Correlation Optics, 2019, Chernivtsi, Ukraine

Abstract

Quadriwave lateral shearing interferometry (QLSI) is well established phase imaging technique. Information about phase distribution within this method is encoded into complex pattern of intensity distribution. So called difference fronts are then extracted via fast Fourier transform (FFT) technique and optimally merged with various integration algorithms, depending on character of measured phase distribution. QLSI experiment is typically build with the use of dedicated shearing device, based on combination of special amplitude grating with phase chessboard. In our experiment, we perform the diffractive shear through phase spatial light modulator (SLM), which also serves as known in advance phase test. In this context, we present a comparison of measurement results with the use of different illumination sources.

Citation Download Citation

T. Fordey and Z. Bouchal "Phase measurement by quadriwave lateral shearing interferometry using spatial light modulator", Proc. SPIE 11369, Fourteenth International Conference on Correlation Optics, 1136912 (6 February 2020); https://doi.org/10.1117/12.2556689

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